Abstract: The invention relates to the preparation of a graft copolymer latex of core/shell dispersion particles having improved phase binding between core and shell in a two-stage emulsion polymerization process, hydroperoxide groups being produced at the particle surface of the grafting base prior to grafting by hydrogen peroxide treatment.

Abstract: This invention provides a novel process of producing magnetically responsive fluorescent polymer particles comprising polymeric core particles coated evenly with a layer of polymer containing magnetically responsive metal oxide. A wide variety of polymeric particles with sizes ranging from 1 to 100 microns can be used a core particles and transformed into magnetically responsive polymer particles. The surface of these magnetically responsive polymer particles can be coated further with another layer of functionalized polymer. These magnetically responsive fluorescent polymer particles can be used for passive or covalent coupling of biological material such as antigens, antibodies, enzymes or DNA/RNA hybridization and used as solid phase for various types of immunoassays, DNA/RNA hybridization probes assays, affinity purification, cell separation and other medical, diagnostic, and industrial applications.

Abstract: Molding materials based on polymethyl methacrylate comprising essentiallyA) from 99.99 to 95.0% by weight of a mixture comprising essentiallya.sub.1) from 5 to 95% by weight of polymethyl methacrylate, obtainable by polymerizing a mixture comprising essentiallya.sub.11) from 80 to 100% by weight of methyl methacrylate anda.sub.12) from 0 to 20% by weight of a C.sub.1 -C.sub.20 -alkyl ester of acrylic acid, anda.sub.2) from 95 to 5% by weight of a multistage graft copolymer based on a C.sub.1 -C.sub.20 -alkyl ester of acrylic and/or methacrylic acid andB) from 0.01 to 5.0% by weight of a polysiloxane of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.10 -aryl,R.sup.2 is hydroxy-C.sub.1 -C.sub.6 -alkyl or amino-C.sub.1 -C.sub.6 -alkyl, andn is a natural number from 5 to 200.

Abstract: In present invention, cationic particle having two-layer structure wherein copolymerized resin comprising a specific copolymer is protected with a film of water soluble resin is contained in aqueous medium. In this way, a glossy film can be obtained by employing the composition of the cationic micro-emulsion; moreover, this film is superior in waterproof, weatherproof, and the like. This composition of the cationic micro-emulsion is effective as top coat material for painting, sealer, and the like.

Abstract: The present invention relates to a capsule for use in heavy duty liquid compositions which capsule comprises:(1) a component subject to degradative attack; and(2) a composite polymer which in turn comprises a hydrophilic portion and hydrophobic polymer core particle.

Abstract: Particles of a fine powder of a thermoplastic synthetic resin (host powder) having a suitable broad range between its initial glass transition temperature (initial T.sub.g) and its final T.sub.g, are partially coated with an anti-caking coating powder (coating powder) by blending at an elevated temperature to form "mottled" particles. The elevated temperature is defined in relation to the initial and final T.sub.g s as: (initial T.sub.g -20).degree. C. but below the final T.sub.g. Mottled particles, without being encapsulated, have the unique ability to maintain their individual particulate characteristics at a temperature at least 10.degree. C. above the initial T.sub.g of the uncoated host powder, and flow freely under applied pressure. Such pressure is applied by a rolling drum which spreads the mottled particles onto a target bed where they are selectively sintered With a controlled high energy beam, usually a laser beam.

Abstract: Polymer particles including polysiloxane is disclosed. The polymer particles are prepared by condensing at least one organosilane or organosiloxane compound in the presence of organic polymer particles which are prepared from specific monomers and dispersed in an aqueous medium. The polymer particles possess excellent water resistance, weatherability, water repellency, adhesion, and flexing resistance, and thus are useful as water paints, coating agents, carpet packing material, floor polishing agents, cementing medium, and the like.

Abstract: Core-shell ABS copolymers having an SAN shell completely surrounding the diene core are provided by melt blending an aliphatic diene polymer with an SAN copolymer, said copolymer containing functional groups capable of reacting with the diene polymer. For example, the SAN copolymer may contain azide groups capable of reacting with the olefinic groups in the diene polymer, or both the SAN copolymer and the diene polymer may contain other functional groups capable of interreaction, such as acidic (e.g., maleic anhydride) groups in the diene and epoxy (e.g., glycidyl methacrylate) groups in the SAN copolymer.

Abstract: Particulate graft polymers composed of a core (a) of cross-linked diene rubber, a first envelope (b) of a cross-linked acrylate rubber, a second envelope (c) of a copolymer of resin-forming monomers and polyallyl monomers having at least three allyl groups in the molecule, and a third envelope (d) of a copolymer or homopolymer of resin forming monomers.

Abstract: There is a need for polymers which are utilized in automotive interiors which offer increased heat and ultraviolet light resistance. It is particularly critical for polymers which are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance. This invention discloses a rubbery polymer which can be blended with polyvinyl chloride to make leathery compositions having good heat and ultraviolet light resistance, said rubbery polymer being comprised of repeat units which are comprised of (a) butyl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to about 40% 2-ethylhexyl acrylate, (b) at least one member selected from the group consisting of methyl methacrylate, ethyl methacrylate, methyl acrylate, and ethyl acrylate, (c) acrylonitrile, (d) styrene, (e) a half ester maleate soap, and (f) a crosslinking agent.

Abstract: An antifouling paint composition comprising a resin vehicle, an antifouling agent and a liquid medium, at least part of the resin vehicle being composed of a nonaqueous dispersion-type resin of a skin-core structure having in the core component an acid group or an acid precursor group convertible into the acid group by hydrolysis, and said antifouling composition being capable of maintaining an effect of preventing adhesion of microorganisms over along term.

Abstract: Controlled foams of crystalline amorphous polymers include a second phase polymeric material having a transition temperature below that of the matrix polymeric material. The second phase material provides nucleating sites for the growth of gas formed cells which are limited in size by the particle size of the second phase polymeric material.

Abstract: A process for preparation of latex of a hollow polymer which comprises adding a base, in the presence of a monomer, to latex containing carboxy-modified copolymer particles to make the pH of the latex 8 or more; adding a carboxyl group-containing monomer to make the pH of the latex 7 or less; and then polymerizing these monomers.

Abstract: Stable aqueous artificial latices having a core-shell structure are prepared from two otherwise incompatible polymers in a blend also including a copolymer of said polymers. For example, an artificial latex in which the particles have a styrene-acrylonitrile core and an EPDM shell can be prepared.

Abstract: The present invention provides an acetal resin composition comprising:(1) 100 parts by weight of an acetal resin; and(2) from 1 to 100 parts by weight of a multiphase interpolymer particle comprising at least an elastomeric phase and a rigid phase, the elastomeric phase obtained by copolymerizing:(A) from 5 to 60% by weight, based on the total weight of monomers for the elastomeric phase, of at least one compound selected from the group consisting of C.sub.1 to C.sub.6 -alkyl monoacrylate, C.sub.1 to C.sub.6 -alkyl monomethacrylate, C.sub.1 to C.sub.6 -hydroxyalkyl monoacrylate and C.sub.1 to C.sub.6 -hydroxyalkyl monomethacrylate; and(B) from 40 to 95% by weight, based on the total weight of monomers for the elastomeric phase, of at least one compound selected from the group consisting of C.sub.7 to C.sub.12 -alkyl monoacrylate and C.sub.7 to C.sub.12 -alkyl monomethacrylate.The acetal resin composition is excellent in both matte property and flexural modulus, and inhibits mold deposit in mold processing.

Abstract: Spherical resin particles in micron order with a narrow particle diameter distribution, methods for the production thereof and uses thereof are disclosed. Overcoming various problems comprised in the hitherto-known polymerization granulation methods, resin particles using a condensation polymer in micron order of the present invention having spherical form and narrow particle diameter distribution serve well for various applications.

Abstract: Core-shell ABS copolymers having an SAN shell completely surrounding the diene core are provided by melt blending an aliphatic diene polymer with an SAN copolymer, said copolymer containing functional groups capable of reacting with the diene polymer. For example, the SAN copolymer may contain azide groups capable of reacting with the olefinic groups in the diene polymer, or both the SAN copolymer and the diene polymer may contain other functional groups capable of interreaction, such as acidic (e.g., maleic anhydride) groups in the diene and epoxy (e.g., glycidyl methacrylate) groups in the SAN copolymer.

Abstract: Spherical resin particles in micron order with a narrow particle diameter distribution, methods for the production thereof and uses thereof are disclosed. Overcoming various problems comprised in the hitherto-known polymerization granulation methods, resin particles using a condensation polymer in micron order of the present invention having spherical form and narrow particle diameter distribution serve well for various applications.

Abstract: Copolyetherimide ester thermoplastic elastomers having low modulus can be improved with respect to modulus and tensile properties by incorporation therein of certain effective multistage, rubbery interpolymers comprising a crosslinked (meth) acrylate phase and an interpenetrating, crosslinked styrenic phase.

Abstract: Disclosed are (1) a water-dispersible resin composition prepared by a process comprising; (I) reacting a silane monomer (A) having hydrolytic functional group and/or silano group and polymerizable unsaturated bond with a vinyl monomer (B) in an aqueous medium to obtain a three-dimensionally crosslinked particulate polymer, (II) reacting the particulate polymer with the silane monomer (A) and/or an allyl acrylate or allyl methacrylate (C), and (III) copolymerizing the resulting reaction product with a vinyl monomer component comprising a carboxyl-containing vinyl monomer (D), followed by neutralizing the carboxyl group; (2) a water-dispersible coating composition comprising a crosslinking agent and the water-dispersible resin composition prepared using a hydroxyl-containing vinyl monomer and another vinyl monomer as the vinyl monomer (B) in the step (I), and (3) a coating method characterized by using as a base coat composition a water-dispersible coating composition comprising the foregoing water-dispersible

Abstract: Multi-stage polymer process and composition having an alkali-insoluble emulsion polymer and an alkali-soluble polymer are produced by a two-stage sequential emulsion polymerization process. When the multi-stage polymers of this invention are utilized as cement modifiers, improvements in cement mortar physical properties are realized.

Abstract: The invention thus provides a core-shell polymer comprising a core phase which is rubbery polymer and a shell phase which is a glassy polymer with an unsaturated dicarboxylic acid or its mono-alkyl ester as a constituent thereof, wherein the toluene-soluble fraction of the core-shell polymer accounts for not more than 10% by weight.It also provides polyamide resin compositions comprising said core-shell polymer and molded articles produced by molding said compositions.The resin compositions and molded articles which comprises the core-shell polymer as an impact modifier have good features, especially a high impact strength at temperature ranging from room temperature to -30.degree. C.

Abstract: A methacrylate resin composition containing 20 to 99% by weight of a methacrylate resin and 80 to 1% by weight of a methacrylic two-layer polymer which has an inner layer and an outer layer and is characterized by the properties: (a) the inner layer having repeating units derived from methyl methacrylate and having a viscosity average molecular weight of 500,000 to 5,000,000, (b) the outer layer of the two-layer polymer having repeating units derived from methyl methacrylate and having a viscosity average molecular weight of 50,000 to 300,000, (c) a weight ratio of the inner layer to the outer layer of 1:9 to 9:1, (d) a glass transition temperature of 50.degree. to 120.degree. C. and (e) an average particle size of 200 to 5000 .ANG., which composition is excellent in moldability, resistance to heat distortion, mechanical properties and also solvent resistance.

Abstract: Colloidal polytetrafluoroethylene fine particles having an average particle size of 0.05 to 1.0 .mu.m and each comprising a core made of polytetrafluoroethylene which has a high molecular weight and can be fibrilled and a shell surrounding the core and made of a low molecular weight polytetrafluoroethylene which is not fibrilled, which has good dispersibility in water or an organic solvent and easily provides an organosol by a phase transfer method.

Abstract: Impact modifiers which produce transparent, high notched Izod impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with cores comprised mainly of rubbery polymers of diolefins and vinyl aromatic monomers and shells comprised mainly of styrene copolymers (e.g. styrene and hydroxyalkyl (meth)acrylate).

Abstract: A powder ink having in the structure a heat-fusible core comprising a thermo-melting substance and a coloring matter and a shell covering the core surface and comprising a resin product obtained by reacting:(1) 0 to 30 mole % of a monovalent isocyanate compound and/or a monovalent isothiocyanate compound and(2) 100 to 70 mole % of at least divalent isocyanate and/or at least divalent isothiocyanate compound with(3) 0 to 30 mole % of a compound having an active hydrogen atom to react with the isocyanate and isothiocyanate groups of (1) ana (2) and(4) 100 to 70 mole % of a compound having at least two active hydrogen atoms to react with the isocyanate and isothiocyanate groups of (1) and (2); at a molar ratio of (1) and (2) to (3) and (4) in the range between 1:1 and 1:2. At least 30 percent of all the linkages involved in the isocyanates and the isothiocyanates in the resin product are thermally linkages.

Abstract: This invention relates to a blend of at least two emulsion polymers. In particular, the emulsion polymer blend comprises from 95 to 40 percent by weight of at least one first latex and from 5 to 60 percent by weight of at least one second latex, wherein the first latex is multi-stage comprising from 95 to 50 percent by weight of at least one soft stage polymer having a Tg less than 50.degree. C. and from 5 to 50 percent by weight of at least one hard stage polymer having a Tg from about 20.degree. C. to about 160.degree. C., and wherein the second latex is not an ambient temperature film-forming polymer. The emulsion polymer blend of this invention can be used to formulate a variety of aqueous coating compositions, such as for example, paints, mastics, caulks, sealants, varnishes, floor polishes, and the like. The emulsion polymer blend of this invention is also useful for formulating an aqueous coating composition which is coalescent-free.

Abstract: The improved organic polymeric adsorbent is used to adsorb and remove suspended impurities present in trace amounts in the water being treated in an apparatus for producing ultrapure water for use in the semiconductor industry or in a condensate purifier in steam power generating facilities and it is composed of a particulate or powdered cation exchange resin and/or anion exchange resin. The improvement is that this adsorbent has such a surface layer structure and morphology that granules are seen to bind with one another when examined under a scanning electron microscope in a field of view ranging from a magnification of 50 to 200,000. The adsorbent may be used as the constituent of a packing layer and/or a filter layer to make a material for removing suspended impurities.

Abstract: Disclosed are polymer having antistatic properties and having a multilayered structure comprising an innermost layer, a second layer, a third layer and an outermost layer; processes for preparing the multilayered polymer; and an antistatic resin composition comprising a thermoplastic resin and the multilayered polymer.

Abstract: Aqueous synthetic resin dispersions comprising latex particles having an average particle diameter below 140 nanometers, consisting ofa) 5 to 45 weight percent of a core material having a dynamic glass transition temperature above 60.degree. C. andb) 95 to 55 weight percent of a shell material having a dynamic glass transition temperature below 80.degree. C., whereby the dynamic glass transition temperature of the shell is at least 20 K. below that of the core,which dispersions have a low minimum film forming temperature and give films of low tackiness and high block point.

Abstract: Rubber-containing graft copolymer particles excellent in powder properties are prepared by a process comprising mixing, with 100 parts by weight (as solid content) of rubber-containing graft copolymer (A) in a state of slurry, 0.1 to 10 parts by weight of a rigid non-elastic multi-stage polymer (B), in a state of slurry, consisting of 30 to 80% by weight of a (co)polymer component comprising 40 to 100% by weight of methyl methacrylate and 0 to 60% by weight of one or more other monomers copolymerizable therewith being polymerized at least in the first stage and 5 to 70% by weight of a (co)polymer component comprising 70 to 100% by weight of methyl methacrylate and 0 to 30% by weight of one or more other monomers copolymerizable therewith being polymerized in the final stage, the total amount of the (co)polymer components in the respective stages being 100% by weight and the content of polymeric units derived from an acrylic ester in the multi-stage polymer (B) being from 5 to 30% by weight.

Abstract: An aqueous, radiation-curable, functionalized latex polymer composition and its preparation are disclosed. The composition is a multistaged latex polymer formed from a first stage polymer and a second stage polymer having .alpha., .beta.-unsaturated carbonyl functionalization which permits curing by UV radiation. The composition dries tack-free before curing. The final cured UV coating has excellent solvent resistance, water resistance, stain resistance, direct impact resistance and hot print resistance. The composition is useful in coatings, adhesives, inks and leather coatings, and is particularly useful as a coating on wood.

Abstract: An acrylic ester copolymer plastisol composition comprises (A) copolymer particles comprising, as the major components thereof, (a) 98 to 50 weight % of an alkyl acrylate unit having an alkyl group of 1 to 8 carbon atoms and/or an alkyl methacrylate unit having an alkyl group of 1 to 8 carbon atoms and (b) 2 to 50 weight % of a diene monomer unit, (B) a plasticizer and, optionally, (C) a vulcanizing agent. Another acrylic ester copolymer plastisol composition comprises (A) copolymer particles comprising an ionic crosslinked copolymer prepared by ionic crosslinking of a copolymer comprising, as the major components thereof, (a) 97 to 50 weight % of an alkyl acrylate unit having an alkyl group of 1 to 8 carbon atoms and/or an alkyl methacrylate unit having an alkyl group of 1 to 8 carbon atoms, (b) 2 to 40 weight % of a diene monomer unit and (c) 1 to 20 weight % of a radical polymerizable unsaturated carboxylic acid unit of 3 to 8 carbon atoms having a carboxyl group and (B) a plasticizer.

Abstract: A multi-layered polymer having (a) a core layer of an aromatic vinyl polymer, (b) an intermediate layer of a butadienic rubbery polymer and (c) an outer layer of an aromatic vinyl glassy polymer, the amount of the components (a), (b) and (c) being 12 to 42 weight %, 48 to 78 weight % and 10 to 40 weight %, respectively, provides a thermoplastic resin composition excellent not only in impact strength, especially in impact strength at low temperatures, but also in, in the case of containing a coloring agent, color-stability including less mottlings, and giving a molded article improved in preventing occurrence of delamination around the gate region.

Abstract: A rubber modified styrene based resin composition which is excellent in the balance of impact strength and shapes appearance such as gloss and especially image clarity, and has a wide applicability in the field of housings for household electric apparatuses and the like requiring such a shapes appearance as having been difficult to achieve with conventional rubber modified polystyrenes (HIPSs), and which comprises a styrene based resin forming a matrix and particulate soft component containing rubbery elastomer dispersed in the matrix, wherein the soft component dispersed in the composition consists of a small-sized particulate component having a core/shell structure and an average particle size of 0.1 to 0.4 .mu.m and a large-sized particulate component having a cell structure and an average particle size of 0.8 to 2.0 .mu.m, a ratio by weight of the small-sized component to the large-sized component being in the range of 90:10 to 99:1, and the resin composition contains an amount of 0.01 to 0.

Abstract: A crosslinked polyurethane polyurea spherically particulate polymer having an average particle diameter of 0.1 to 500 .mu.m, wherein the polymer molecule contains an isocyanurate ring in an amount of 10 to 30% by weight is disclosed. A process for producing the crosslinked polyurethane polyurea spherically particulate polymer is also disclosed.

Abstract: An epoxy resin adhesive composition has excellent adhesive properties such as impact resistance, tensile shear strength and T-peel strength as well as excellent semi-gelling property. An epoxy resin adhesive composition comprising ionic crosslinking in a polymer utilized as the impact resistance modifier has not only excellent semi-gelling property and mechanical properties of cured products but also excellent storage stability for a long time and it is advantageously utilized when the application occasionally requires storage or standing of the material for one month to one year at the room temperature. The epoxy resin adhesive composition comprises an epoxy resin, a powder core/shell polymer and a heat activation type hardener for epoxy resins. The powder core/shell polymer is composed of a core comprising an acrylate polymer or a methacrylate polymer having a glass transition temperature of -30.degree. C.

Abstract: Disclosed are (1) a water-dispersible resin composition prepared by a process comprising; (I) reacting a silane monomer (A) having hydrolytic functional group and/or silanol group and polymerizable unsaturated bond with a vinyl monomer (B) in an aqueous medium to obtain a three-dimensionally crosslinked particulate polymer, (II) reacting the particulate polymer with the silane monomer (A) or a mixture of the silane monomer (A) and an allyl acrylate or allyl methacrylate (C), and (III) copolymerizing the resulting reaction product with a vinyl monomer component comprising a carboxyl-containing vinyl monomer (D), followed by neutralizing the carboxyl group; (2) a water-dispersible coating composition comprising a crosslinking agent and the water-dispersible resin composition prepared using a hydroxyl-containing vinyl monomer and another vinyl monomer as the vinyl monomer (B) in the step (I), and (3) a coating method characterized by using as a base coat composition a water-dispersible coating composition compri

Abstract: A novel process of sequentially mixing polymers comprisinga. mixing together and melt blending impact modifier and semicrystalline polymer to form a preblend, andb. mixing together and melt blending the preblend with amorphous polymer,and polymer compositions produced as a result of the novel process are disclosed.

Abstract: The present invention relates to a core-shell polymer which is useful for polyoxymethylene resin, a polyoxymethylene resin composition containing the core-shell polymer and a molded article made of the polyoxymethylene resin.The core-shell polymer is produced by an emulsion polymerization reaction using an oligomeric surfactant and a neutral radicals-liberating polymerization initiator.This core-shell polymer makes the molded article be improved on the impact strength, elongation at the weld line, weatherability, thermal stability, etc., and the molded articles is used as various products.

Abstract: The invention provides a core-shell polymer which comprises (a) a core phase having carboxyl groups on surface part of the core and (b) a shell phase which is a glassy polymer containing neither functional groups reactive to the the carboxyl group nor functional groups reactive to the amino group, wherein the toluene-soluble fraction is not higher than 10% by weight based on the whole core-shell polymer; polyamide resin compositions comprising said core-shell polymer; and molded articles produced by molding said compositions.Impact strength of the resin composition or its molded articles was improved by using the core-shell polymer.

Abstract: A polymer composition comprising2-50 parts by weight of a fine particles component dispersed in a matrix described later, of (1) a high-nitrile (co)polymer, wherein the proportion of the nitrile polymeric unit (a) is at least 86% by weight based on the total of the high-nitrile (co)polymer, and98-50 parts by weight of a matrix of (2) a low-nitrile copolymer comprising the nitrile polymeric unit (a), the acrylic ester polymeric unit (b) and the aryl vinyl polymeric unit (c), wherein the proportion of the polymeric unit (a) is 50-85 % by weight and the polymeric unit (b) and the polymeric unit (c) occupy the remaining portion.

Abstract: A molding composition containing, based on the total weight of the composition:A) at least 40% by weight of at least one halogen-free polycarbonate;B) 5-40% by weight of at least one halogen-free graft copolymer composed of;1) 40-80% by weight of an elastomer with a glass transition temperature below 0.degree. C., which elastomer is composed of, at least 50% by weight of a diene or of an at least C.sub.4 -alkyl acrylate, 1-40% by weight of a halogen-free phosphorus compound of the formula ##STR1## 2) 20-60% by weight of a shell composed of, 40-98% by weight of styrene, .alpha.-alkylstyrene, nuclear-substituted styrene and/or C.sub.1 -C.sub.8 -alkyl (meth)acrylate, and 2-60% by weight of (meth)acrylonitrile and/or maleic anhydride;C) 5-40% by weight of a halogen-free thermoplastic copolymer composed of, 50-95% by weight of styrene, .alpha.-alkylstyrene, nuclear-substituted styrene and/or C.sub.1 -C.sub.

Abstract: Core/shell additives, useful in modifying the processing and/or physical properties of poly(vinyl chloride) and other thermoplastic matrix polymers, are prepared separately at small particle sizes by emulsion polymerization, co-agglomerated, further encapsulated by a final shell, and isolated by spray-drying or coagulation. The isolated powders are readily re-dispersed to their original particle sizes in the matrix polymer.

Abstract: A cored multi-shell emulsion particle consisting of a core particle, a void layer existing in the exterior of the core particle and a shell layer, each of which has a diameter of .phi., d and D, respectively, and the ratio of .phi., d and D is in the following range..phi./D=0.1-0.6d/D=0.2-0.8 (d>.phi.)The particle exhibits excellent hiding power, brightness, gloss and thermal insulation property as an organic pigment without impairing drying ability and strength of coated layer.

Abstract: An emulsion polymer having at least three phases, adaptable as an agent for modifying the impact resistance of rigid thermoplastic synthetic resins such as polymethyl methacrylate, and consisting ofA) a rigid core phase of a crosslinked homo- or copolymer,B) an elastomer phase, prepared in the presence of the core material and having a glass transition temperature not above -10.degree. C., comprising a crosslinked resin which includes an arylalkyl acrylate or arylalkyl methacrylate, andC) a rigid shell phase, prepared in the presence of the elastomer phase, having a glass transition temperature of at least 50.degree. C.

Abstract: Multi-stage rubber-based MBS resin compositions are provided which include a polymeric substrate stage of a conjugated diolefin-based polymer or copolymer and optional units derived from a cross-linking agent or agents, and at least one polymeric graft stage graft polymerized in the presence of the substrate stage which include monomers of an acrylate, a vinyl aromatic, or a mixture of those monomers and optional units derived from a cross-linking agent or agents and/or units which serve as a graft-linking agent or agents wherein the weight ratio of acrylate in all graft stages combined to vinyl aromatic in all graft stages combined is at least 1.2:1. Additionally, modified vinyl chloride polymer compositions which include a vinyl chloride polymer or copolymer in combination with an impact modifying, yellowness index improving amount of the multi-stage rubber-based resin compositions above are provided.

Abstract: Multi-stage polymer particles comprising at least one hydrophobically-modified, ionically-soluble polymer stage polymerized from a) hydrophobic monomer, b) ethylenically-unsaturated, ionizable monomer, c) non-ionic, ethylenically-unsaturated monomer and optionally d) multi-functional compound are improved thickeners.

Abstract: The present invention is directed to a composite resin system comprised of thermoplastic and thermoset resins wherein the phase morphology is cocontinuous. To this composite resin system are added particulate toughening agents which improve the toughness.

Abstract: Improved plasticizer resistant pressure sensitive hot melt adhesive compositions are prepared by incorporating in the adhesive polymer, tackifying resin and oil 5 to 70% by weight of the adhesive of a core shell modifier comprising a crosslinked rubbery core and a glassy thermoplastic polymer shell, the core being crosslinked by the presence therein of up to 5% by weight of a polyunsaturated monomer having two or more non-conjugated sites of unsaturation of unequal reactivity.